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(No Mode 1.) L. B. BATTIN.

' STEAM BOILER.

' No.. 381,822. Patented Apr. 24, 1888.

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UNITED STATES PATENT OFFICE.

LAMBERT B. BATTIN, OF ELIZABETH, NEW JERSEY.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 381,822,' dated April24,1888. Application filed November 15, 1887. Serial No. 255,254. (Nomodel.)

To aZZ whom it may concern:

Be it known that I, LAMBERT B. BATTIN, a citizen of the United States,residing at Elizabeth, county of Union, and State of New J ersey, haveinvented certain new and useful Improvements in Steam-Boilers, of whichthe ollowing is a full, clear, and exact specifica- The object of myinvention is to decrease the number of joints heretofore necessary inthe construction of steam-generators and to obviate the necessity ofexposing such joints as are employed to the direct action of theproducts of combustion from the fire box, which, as it is well known,produce exceedi'ngly detrimental effects upon such joints and therebycause leakage from the boiler.

The other important object of my invention is to construct a water-tubesteam-generator whose interior is as easily accessible as the exterior,and in the invention, hereinafter described, it will be seen that theinterior of onehalf of the tubes can be easily reached bysimplyremovingoneoftheheadercovers,which facilitates the cleaning of theboiler and making any necessary repairs.

My invention consists of a novel arrangement of boxes into which theends of the boilertubes are expanded, which boxes will be hereinaftertermed the headers Each of these headers is provided with a removablecover, and is long in comparison with its width, so as to enable a greatassembly of tubes to open thereinto, and at the same time avoid thedanger arising from too great a cross-section being subjected to thesteam-pressure.

My invention also consists of certain features of novelty hereinafterdescribed.

In the present form of my invention, I prefer to employ two of theaforesaid headers and bend the boiler-tubes into U form and connect thetwo ends of each tube with the respective headers; but my invention andthe details of construction will be better understood from a descriptionthereof with reference to the accompanying drawings, which I will nowgive, and in which drawings- Figure 1 is a front view of the preferredform of my steam-generator, showing the furnace. -Fig. 2 is a plan viewof the same, portions being removed and portions being broken away.

As shown in the drawings, I preferably ar range the two boxes or headers1 2 with their upper ends together and their lower ends diverged orseparated, and consequently the U-shaped boiler-tubes 3 will assume incrosssection the form of atruncated pyramid. The object of thisarrangement of the headers is to make the apparatus more compact andbring the bulk of the weight nearer to the base or the floor by enablingthe fire-box 4 to be placed between the bottom tubes, and while theupper ends of the boxes being convergent brings the tubes thereindirectly over the center of the fire-box or in the current of theproducts of combustion, it also reduces the superfluous bulk of thefurnace or firebox, and hence this form is most applicable to marinepurposes. This particular construction is not necessary, however, andmay be modified for stationary or land boilers.

The headers 1 2 are provided with removable covers, as before mentioned,which are retained in position by means of screw-bolts 15, and whichwhen removed reveal the ends of the boiler-tubes,which greatlyfacilitates in the cleansing of the latter, and these two headers, withthe tubes connecting them and extending through and across thecombustion- 8o chamber,practically constitute my boiler. The feed-waterenters the header 1 through the pipe 5, then enters the tubes, andpasses through the combustion-chamber, and, together with the steamgenerated from such passage,collects in the opposite header, 2, fromwhence it enters the steam-dome 6 via the pipe 7, thus causing apositivecirculation through the boiler. This steamdome is preferably as long asthe boilertubes, and is practically located within the 0combustion-chamber, supported at each end by the end walls of thelatter, through which it projects just above the boiler-tubes,sothat itwill be fully exposed to the products of combustion, whereby the steamtherein will be dry.

The case of the combustion-chamber is preferably composed of two parts,9 10, of sheet metal. The surface of theinner one, nextto the fire, maybe lined with any suitable fire brick or clay, 11; but the intermediatespace between the two is filled with asbestus, 12, or other suitablenon-conducting material, which, being non-combustible and anon-conductor of heat, confines the heat to the combustionchamber, andat the same time forms a light and effective wall. The crown of thefurnace may be formed in a similar manner, and it is provided with eavesor flanges 13,which rest upon the upper edges of the case, as shown, andthus hold it in place. This crown completely incases the dome, with theexception of a small portion at each end, and leaves only sutficientspace between it and the former for a free draft and the passage of theproducts of combustion, which exit via the stack 14 planted in saidcrown. 1

Having thus described my invenlio'n,the following is what I claim as newtherein and desire to secure by Letters Patent:

LAMBERT B. BATTIN.

Witnesses:

HERBERT KNIGHT, F. A. HOPKINS.

